689565791238 has 16 divisors (see below), whose sum is σ = 1379153212416. Its totient is φ = 229851658760.

The previous prime is 689565791227. The next prime is 689565791261. The reversal of 689565791238 is 832197565986.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 471006 + ... + 1265297.

It is an arithmetic number, because the mean of its divisors is an integer number (86197075776).

Almost surely, 2^689565791238 is an apocalyptic number.

689565791238 is an abundant number, since it is smaller than the sum of its proper divisors (689587421178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

689565791238 is a wasteful number, since it uses less digits than its factorization.

689565791238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802499.

The product of its digits is 195955200, while the sum is 69.

The spelling of 689565791238 in words is "six hundred eighty-nine billion, five hundred sixty-five million, seven hundred ninety-one thousand, two hundred thirty-eight".